One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9)(3,10,12,7)(4,8,5,13)(11,16,14,15)(17,18)(19,22)(20,23)(21,24)(25,29)(26,30)(27,31)(28,32)(33,34,38,41,37,43,36,42)(35,40,45,39,44,48,46,47)(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,10)(13,16)(17,19)(18,22)(20,27)(21,26)(23,31)(24,30)(25,28)(29,32)(35,44)(39,47)(40,48)(45,46) involution — undirected(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,10,16)(17,20,21,28)(18,23,24,32)(19,25,26,27)(22,29,30,31)(33,35)(34,39)(36,45)(37,44)(38,46)(40,41)(42,48)(43,47)(1,5,6,4)(2,8,9,13)(3,11,12,14)(7,16,10,15)(19,26)(22,30)(25,27)(29,31)(33,35)(34,40)(36,46)(37,44)(38,45)(39,41)(42,47)(43,48)(2,9)(7,10)(8,13)(15,16)(18,24)(22,30)(23,32)(29,31)(33,36,37,38)(34,41,43,42)(35,45,44,46)(39,40,47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.